All of the hormones that go into Yaz and Yasmin are manufactured in a laboratory. In that respect, the drugs are no different than any other birth control pill. What makes Yaz and Yasmin so unique is that they contain the hormone drospirenone, or “DRSP.” DRSP, which has never before been used in a birth control pill, is “synthetic.” A synthetic hormone is one formulated to be molecularly similar to a hormone found in the human body, but not “bio-identical” to it.
DRSP was designed to be molecularly similar to the naturally occuring human hormone progesterone. DRSP is no more effective at its job than either progesterone or one of the man-made hormones in other birth control pills that are bio-identical to progesterone. However, DRSP is more dangerous and more frequently causes serious side effects, including clotting.
Progesterone Drospirenone (DRSP)
Why would Bayer use a synthetic hormone if it is more dangerous, but no more effective, than an easily manufactured bio-identical hormone? The short answer is money. A drug company can’t patent a bio-identical hormone, since is an exact copy of what nature produces. Only a synthetic hormone can be patented. And only with a patent can a drug company protect the market share its advertising campaign wins over.
No synthetic hormone means no patent. No patent means no huge profits.